• Cretaceous of Antarctica (2 collections), Argentina (60), Belgium (6), Bolivia (3), Brazil (1), Canada (149: Alberta, British Columbia, Nunavut, Saskatchewan, Yukon), China (15), France (6), Japan (3), Kazakhstan (24), Kyrgyzstan (15), Laos (1), Mexico (81), Mongolia (28), the Netherlands (6), New Zealand (1), the Russian Federation (2), Spain (46), Tajikistan (4), United States (447: Alabama, Alaska, Alberta, Arizona, California, Colorado, Delaware, Georgia, Iowa, Kansas, Maryland, Mississippi, Missouri, Montana, Nebraska, Nevada, New Jersey, New Mexico, North Carolina, North Dakota, South Carolina, South Dakota, Tennessee, Texas, Utah, Wyoming), Uzbekistan (40)

Total: 940 collections including 944 occurrences